Which of the following statements are correct about trilemma in monetary policy

A. It is related to closed economy model.

B. It involves exchange rate, capital mobility and monetary policy.

C. It arises because perfect capital mobility aligns the domestic interest rate to the world interest rate.

D. Flexible exchange rate is not compatible with independent monetary policy.

E. It is related to capital immobility and flexible exchange rate.

Choose the correct answer from the option given below: